---
id: CVE-2026-33522
title: BUG-000182936 - ArcGIS Server has a security vulnerability.
summary: >-
  Esri ArcGIS Server versions 11.3 to 12.0 ONLY allows a remote, unauthenticated
  attacker to update service metadata. A patch is provided for ArcGIS Server
  software in General Availability and Extended support status, which includes
  versio…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-285
vendor: Esri
product: ArcGIS Server
affected:
  - arcgis_server >= 11.3 < 12.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-26T18:55:00.979176Z'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T19:38:28.853Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-33522'
references:
  - url: >-
      https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/october-2026-arcgis-security-bulletin
tags:
  - cve.org
ingestedAt: '2026-10-26T18:35:51.491Z'
epss: 0.00288
epssPercentile: 0.21203
---

## Overview

Esri ArcGIS Server versions 11.3 to 12.0 ONLY allows a remote, unauthenticated attacker to update service metadata. A patch is provided for ArcGIS Server software in General Availability and Extended support status, which includes versions 12.0, 11.5, and 11.3. Other versions are in mature or retired status, which are not patch eligible. Users working with unlisted versions are advised to upgrade and apply the patch.

## Affected

- `arcgis_server >= 11.3 < 12.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.